[quote]ORIGINAL: billberry189
ORIGINAL: rg1911
You might try a Uni-bit of the proper size. I have one in my tool box that goes up to an inch and three eighths including one step at an inch and a quarter. The only problem would be that you would have to drill each rib one at a time,but if you are careful it should come out just fine with concentric holes.
That should do the trick (assuming that the sleeve from TnT cones in at 1.25 inches), especially since the Uni-bit probably has a step at 1 inch, which would center the hole.
I much appreciate you sharing your knowledge and experience.
Cheers,
Richard